Thursday’s ad is for beer generally, from the 1950s. It was created for the Brewers Society, presumably a brewing industry trade organization in Great Britain. It appears that the Brewers Society became the British Beer & Pub Association in the 1990s. A quick search reveals that they did a series of ads in the 1950s using a tagline referring to beer as “The Best Long Drink in the World.” This one features a boat, but instead of the coxswain shouting “stroke,” they’re all shouting “good wholesome beer” instead.

Despite this ad being the size I found it, the resolution is terrible, but the smaller one below is slightly sharper, despite being much smaller.